JPS56163533A - Optical recorder and reproducer - Google Patents

Optical recorder and reproducer

Info

Publication number
JPS56163533A
JPS56163533A JP6613880A JP6613880A JPS56163533A JP S56163533 A JPS56163533 A JP S56163533A JP 6613880 A JP6613880 A JP 6613880A JP 6613880 A JP6613880 A JP 6613880A JP S56163533 A JPS56163533 A JP S56163533A
Authority
JP
Japan
Prior art keywords
focal
cylindrical lens
lens
junction surface
optical axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6613880A
Other languages
Japanese (ja)
Other versions
JPS6232532B2 (en
Inventor
Tomio Yoshida
Akifumi Nakada
Michiyoshi Nagashima
Shunji Harikae
Toshio Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6613880A priority Critical patent/JPS56163533A/en
Publication of JPS56163533A publication Critical patent/JPS56163533A/en
Publication of JPS6232532B2 publication Critical patent/JPS6232532B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To miniaturize the structure and ensure a stable working to a fluctuation of temperature, by using a concave cylindrical lens and a convex cylindrical lens having the curved surfaces in the direction parallel to the junction surface of a semiconductor laser. CONSTITUTION:The section along an optical axis in the direction vertical to the junction surface of a semiconductor laser is shown by (a); and the section along an optical axis in the direction parallel to the junction surface is shown by (b). A point l is disposed so that it functions as the focal surface of a concave cylindrical lens 14 as well as the focal surface of a convex cylindrical lens 16, respectively. Thus the parallel beams of a luminous flux width theta2 are converted to the parallel beams of a luminous flux width theta3 to reduce distances qr and st. The focal distance f13 of a focal lens 13 is set larger than the focal distance f19 of a diaphragm lens 19 to prevent the characteristic deterioration which is caused by a variation of temperature.
JP6613880A 1980-05-19 1980-05-19 Optical recorder and reproducer Granted JPS56163533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6613880A JPS56163533A (en) 1980-05-19 1980-05-19 Optical recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6613880A JPS56163533A (en) 1980-05-19 1980-05-19 Optical recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS56163533A true JPS56163533A (en) 1981-12-16
JPS6232532B2 JPS6232532B2 (en) 1987-07-15

Family

ID=13307195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6613880A Granted JPS56163533A (en) 1980-05-19 1980-05-19 Optical recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS56163533A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933420A (en) * 1982-07-28 1984-02-23 ゼロツクス・コ−ポレ−シヨン Optical system
WO1985004978A1 (en) * 1984-04-18 1985-11-07 Sony Corporation Recording/reproducing optical system
JPS6118918A (en) * 1984-07-05 1986-01-27 Ricoh Co Ltd Beam shaping optical system
JPS61196223A (en) * 1985-02-26 1986-08-30 Ricoh Co Ltd Optical system for prism beam shaping
JPH07169089A (en) * 1994-10-03 1995-07-04 Ricoh Co Ltd Optical disk apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50136051A (en) * 1974-04-15 1975-10-28
JPS5371846A (en) * 1976-12-08 1978-06-26 Mansei Kogyo Kk Optics to obtain equal direction spot from various direction light beam
JPS53100844A (en) * 1977-02-15 1978-09-02 Canon Inc Beam shaping optical system
JPS5441A (en) * 1977-06-03 1979-01-05 Kansai Paint Co Ltd Coating method
JPS5543577A (en) * 1978-09-21 1980-03-27 Canon Inc Light source device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50136051A (en) * 1974-04-15 1975-10-28
JPS5371846A (en) * 1976-12-08 1978-06-26 Mansei Kogyo Kk Optics to obtain equal direction spot from various direction light beam
JPS53100844A (en) * 1977-02-15 1978-09-02 Canon Inc Beam shaping optical system
JPS5441A (en) * 1977-06-03 1979-01-05 Kansai Paint Co Ltd Coating method
JPS5543577A (en) * 1978-09-21 1980-03-27 Canon Inc Light source device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933420A (en) * 1982-07-28 1984-02-23 ゼロツクス・コ−ポレ−シヨン Optical system
WO1985004978A1 (en) * 1984-04-18 1985-11-07 Sony Corporation Recording/reproducing optical system
US4744073A (en) * 1984-04-18 1988-05-10 Sony Corporation Recording/reproducing optical system utilizing semiconductor laser light source and anamorphic imaging element
JPS6118918A (en) * 1984-07-05 1986-01-27 Ricoh Co Ltd Beam shaping optical system
JPH0576610B2 (en) * 1984-07-05 1993-10-25 Ricoh Kk
JPS61196223A (en) * 1985-02-26 1986-08-30 Ricoh Co Ltd Optical system for prism beam shaping
JPH07169089A (en) * 1994-10-03 1995-07-04 Ricoh Co Ltd Optical disk apparatus

Also Published As

Publication number Publication date
JPS6232532B2 (en) 1987-07-15

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